Cylinder mold of paper-making machines



Nov. 18, 1930. 1-. YONEKURA CYLINDER MOLD OF PAPER MAKING MACHINES FiledFeb. 23, 1929 Patented Nov. 18, 1930 UNITED STATES PATENT OFFICE,

CYLINDER MOLD OF PAPER-MAKING- MACHINES Application filed February 23,1929, Serial No. 342,179, and in Japan September 18, 1928.

This invention relates to an improvement in cylinder molds ofpaper-making machines and has, for its object the prevention of waterfrom being stirred up in the cylinder of paper-making machines byreducing resistance of the body of cylinder to the minimum.

The device. invented is characterized in that a flow of water whichmakes the raw material stick to the net is produced by utilizing a smalldifference in the level of water between that of the fluid raw materialfor paper in the stuff tank and that of the water contained in thecylinder and runs in the direction of the interior of cylinder from itsexterior and further in that the said water after running through thenet enters into a circular chamber having'a series of waterpassages andslowly and evenly flows into the cylinder, at the same time reducing theresistance of cylinder and preventing the stir as already mentioned.Furthermore, the device is so arranged that water contained in the wetpaper sticking to the surface of net is absorbed as much as possible bycapillary action into the circular chamber in its course of running outthe stuff-tank and reaching the couch roll which is situated above thetank, the water thus absorbed after remaining in the chamber enters intothe cylinder evenly and drop by drop through the waterpassages, by meansof which the stir of water in the cylinder is prevented. Lastly, it isto be added as a feature of this invention that the sectional face ofthe spiders used for this device is made in the'form of a flat diamondwhich has the advantage of reducing the resistance of water and ofscooping the water out of the cylinder.

The annexed drawings illustrate the operation of the improved cylindermold ,in

chambers by means of holes made at the roots of flanges as abovedescribed; or the channels 6 may be made in zigzag lines along the wholelength of the wall of the cylinder.

These and any other such modifications may of course be made accordingto the facility of draining of water, weight and the strength of thematerials and their inter-relations.

Reverting to the water channel (4), it is so shaped that the waterflowing in from circular chamber is easily led to drain. ofi or to flowinto the cylinder without disturbing the water which stands therein(Figs. 1 and 2 are referred to) and further that when the projectingflanges rotate in the water, the stirring up orsplashing of wateragainst the wall of the channel or the resistance directed against thereverse side of net which receives liquid pulp is entirely avoided or atleast minimized.

The cylinder has at each of its both ends a circular brim-piece (13)fixed and the spid-' 1 ers (7 between the body of wheel (5) and the saidbrim-piece have their sections made in diamond shape. The acute pointsof the diamonds point in direction of cylinders vented. Figs. 1 and 2arethe left half of the rotation by which the resistance of radial moldin vertical, and horizontal sections'respectively. Fig. 3 shows in anenlarged section, the bands from which their teeth project, Figs, 4 to 8show the modified types of the cylinder mold in partsand in sections.Jhe same number designates the same part throughout all the drawings.

To illustrate by the drawings, a cylinder 50 (1) is provided, around itsperiphery is a supports in Water is reduced to a great advantage. Overand between the projecting rings (8) of brim-pieces fixed at the end ofthe cylinder, a sheet of net-work or a square frame wattled with woodenor other bars is stretched close over the top of projecting flanges andstufling boxes are provided for the said brim-pieces.

Fig. (4) shows the construction of a cylinder 1) made of detachable ordivisible members so that a cylinder can conveniently be made to anydesired length. For this purpose, flange is provided at the end ofconfronting members (1) and (1) which are fastened by fixing the bothflanges with bolts. Fig. 5 shows another method of constructingdetachable members into one complete cylinder by cutting away the bulgeof the said flange at its one end in order to form a circular chamber(11) the inner diameter of which is greater than that of cylinder, byproviding, at its other end a circular sharply bulging flange (12) whichhas the outer diameter corresponding with the inner diameter of the saidchamber by press ing the said sharply bulging out flanges into thecircular chamber and by thus fixing or connecting the members. Fig. (6),shows the cylinder provided with spiders at its two ends which is doneby having a circular chamber (11) on the outside end of cylinder cutaway and providing the circular brim-piece with a circular sharplybulging-out flange (12) on its inner face, and pressing into the saidcircular chamber (11) the circular sharply bulging flange of thecylinder, the outer diameter of which is to correspond with the innerdiameter of the said circular chamber.

Figs. 7 and 8 show the cylinder having a number of oblong plates (14),around its periphery, the ends of which plates, when seen in a section,are diamond-shaped and arranged with their axial lines in parallel overthe cylinder and with suitable distance kept between them. The saidplates are fixed toether, at their two ends, with rim-rings %15).Further, the cylinder is shown, distributed in the axial line of thecylinder with a number of flattened rings (16) which are fixed to thesaid plates by welding.

Claim: I

In a cylinder mold for paper making machines, a cylinder having aplurality of spaced annular flanges on its periphery defining liquidpassageways, the periphery of the cylinder being perforated for theentrance and exit of liquid, certain of the flanges having openingstherein which are bevelled from the outer faces of such flanges andcommunicate with two adjacent perforations.

In testimony whereof I have signed my name to this specification.

TARIO YONEKURA.

